Question

Which quantity has the unit of watt.

Answer 1

Electric power is the measure of the speed of electricity transfer by an electrical circuit per unit of time. Denoted by P and measured using the SI unit of power is that the watt or one joule per second. Electrical power is usually supplied by sources like electric batteries and produced by electric generators.

Formula Used:
$P = VI$
where,
$P$ is the power
$V$ is the potential difference in the circuit
$I$ is the electric current

Complete step-by-step solution:
If voltage (V) equals Joules per Coulombs ($V = J/C$) and Amperes (I) equals charge (coulombs) per second ($A = Q/t$), then we will define electric power (P) as being the totality of those two quantities. This is often because electric power also can equal the product of voltage and amperes, that is: $P = VI$.
Power (P) is the rate at which energy is transferred or converted. Thus, power equals work divided by time ($P{\text{ }} = {\text{ }}W{\text{ }}/{\text{ }}t$). The SI unit of power is that the watt (W), by Scottish inventor Watt (1736 - 1819)
It is a scalar unit.
$P = VI$
where,
where,
$P$ is the power
$V$ is the potential difference in the circuit
$I$ is the electric current
Hence, Electric power has the unit of watt.

Note: By ohm’s Law, we know that,
$V = IR$
Where,
$R$ is the resistance in the circuit.
$V$ is the potential difference in the circuit
$I$ is the electric current
Power can also be written as
$P = {I^2}R$ and $P = {V^2}/R$
Electric power, produced from central generating stations and distributed over an electrical transmission grid, is widely utilized in industrial, commercial, and consumer applications. The per capita electrical power consumption of a village correlates with its industrial development.